.nav{
    width: 100%;
    background: #f1f1f1;
    padding: 10px;
    display: flex;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 1;
    .nav_item{
        font-size: 15px;
        color: #333;
        .tag{
            font-size: 12px;
            color: #a5a5a5;
            margin-top: 3px;
            text-align: center;
        }
        .avtive_name{
            color: #e93323;
        }
        .active_tag{
            color: #fff;
            background: #e93323;
            border-radius: 20px;
        }
    }
}